Grain-cleaning machine



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UNITED STATES PATENT OFFICE.

JNO. DE RUSH, OF ST. MARYS, OHIO.

GRAIN-CLEANING MACHINE.

Specification of Letters Patent No. 20,196, dated May 11, 1858.

To all whom it may concern:

Be it known that I, JoHN DE RUSH, of St. Marys, in the county ofrruglaize and State of Ohio, have invented a new and ImprovedGrain-Cleaning Machine; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe annexed drawings, making a part of this specification, in which-Figures 1 and 2, are vertical central sec tions of my improvement, thetwo planes of section crossing each other at right angles. Fig. 3, is ahorizontal section of ditto, taken in the line a, w, Fig. 1. Fig. 4, isa vertical section of two of the suction spouts taken in the line 1 y,Fig. 2.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention consists in the employment or use of a heater and scourerarranged relatively with suction spouts and a fan, as hereinafter fullyshown and described, whereby a machine exceedingly simple and economicalin its construction is obtained, and one that will separate smut, dirtand all foreign impurities from grain in a perfect manner, with a smallexpenditure of power.

To enable those skilled in the art to fully understand and construct myinvention I will proceed to describe it.

A, represents a quadrilateral box or case which is supported by a standB, or any proper framing, and C, is a shaft which passes verticallythrough the center of the box A. The lower end of this shaft is stepperin a bridge tree D, which at the upper part of the stand or framing B.The box or case A, is divided into two parts a, 7), by a horizontalpartition 0, and the lower compartment a, has a fan box E, placed withinit, the fan F. being fitted on the shaft C. The fan box IE, is providedat one side with a discharge spout d.

To the upper part of the shaft C, above the box A, a curved metal plate6, is permanently attached, and a similarly shaped plate f, ispermanently attached to an annular plate or ring g, which is secured toan annular trough h, attached to the upper surface of the box A.

G, is a spout which leads from the annular trough it, into the upperpart or spout A. attached to the box A.

The precise form of the two plates 6, f, is shown in Fig. 1. The lowerplate 6 may be described as forming a convex ring, the outer portion ofwhich is corrugated as shown at '1', and the inner part is toothed asshown at j. The upper plate f, is inversely of the same form and istoothed and corrugated in a corresponding manner. The upper end of theshaft C, is fitted in a bearing is, formed in a bow or curved bar whichis attached to the upper side of the plate f.

H, is a curved or semi-circular spout attached to the upper surface ofthe box A. One end of this spout communicates with a horizontal spout I,which is attached to one side of the upper part of the box A, and theopposite end is provided with a slide door Z. The spout I, communicateswith the upper end of the vertical spout A, which, has an inclinedscreen K, fitted within it, said screen conducting the grain into avertical spout L, which is placed by the side of spout- A. The upper endof the spout L, communicates with a horizontal spout M, which is placedby the side of the box A, opposite to the side where the spout I, isattached. Each spout I, M, is made to communicate with the compartmentZ), of box H, by means of a valve N, shown in Fig. 1. Each spout I, M,communicates with a chest 0, see Fig. 1, said chests having inclinedends and provided with flap doors m, at the lower ends.

P, is a spout which leads from the spout H to an annular opening (6, atthe center of the upper plate f. The upper end of spout I is connectedwith an inclined screen Q, in the spout H, with which screen a hopper g,on the outer side of spout P, communicates.

The operation is as follows: The grain to be cleaned is poured into thehopper g, and the shaft C, is rotated in any proper manner. The grain inpassing over the screen Q, is subjected to a blast produced in spout H,by the action of the fan F, and all dust, and light impurities are drawnthrough said spout H, into the compartment 6. of box A, and into the fanbox E, and ected therefrom by the fan F, through the discharge spout (Z,see arrows 1. The grain thus partially cleaned passes down through theopening a", between the plates e, f, where it is secured by the actionof the plates, the corrugations i, and the teeth j, aided by thepeculiar form of the plates which prevents the too speedy exit of thegrain, effectually scouring the dirt from the surface of the

